What Healer kit (not encounter) change would make GCD heals NOT bad gameplay?

[Aravell]

That said, something I've been thinking about lately is a way the lily system could be different and not promote so much overhealing, and the idea goes like this: Instead of Solace and Rapture being flat heals, we have three lily actions. I'll use some blunt names for the sake of simplicity.

Afflatus Fast Cast - Makes your next spell instant cast. Costs 1 lily and nourishes the blood lily. Also grants 1 stack of Growth.
Afflatus MP - Causes your next spell to restore your MP by an amount equal to its MP Cost. Costs 1 lily and nourishes the blood . Also grants 1 stack of Growth.
Afflatus Healing - Increases the potency of your next healing spell by 30%. Costs 1 lily and nourishes the blood lily. Also grants 1 sack of Growth.
Growth effect: If your next spell cast is a healing spell, that spell also nourishes the blood lily.

In other words, it's a soft 1-2 heal combo where you augment a heal before activating it all while staying DPS neutral. How do you feel about something like that?

I'm a supporter of more interesting kit design and also of powerful abilities coming at a cost. Your suggestions would expand the lily system and make it more interesting, but I'd change just one thing about the Growth effect, I'd make it a stacking effect that's granted by the buffed GCD heal and at 2 stacks of Growth, you're refunded a lily. Yes, it would become a dps loss because you'd have to use 2 GCD heals under the buff effects to get 1 lily back, but I'd like to see powerful abilities actually cost something to use again. So it would be:

Afflatus Fast Cast - Makes your next spell instant cast. Costs 1 lily and nourishes the blood lily. Also causes your next spell to grant 1 stack of Growth.
Afflatus MP - Causes your next spell to restore your MP by an amount equal to its MP Cost. Costs 1 lily and nourishes the blood lily. Also causes your next spell to grant 1 stack of Growth.
Afflatus Healing - Increases the potency of your next healing spell by 30%. Costs 1 lily and nourishes the blood lily. Also causes your next spell to grant 1 stack of Growth.
Growth effect: At 2 stacks, grants 1 lily.